Question: Are Diet Mountain Dew and J2O both soft drinks?

Context articles: List of energy drinks
Mountain Dew
J2O
Diet Mountain Dew (song)
Diet Pepsi
Pepsi-Cola Made with Real Sugar
Beat (drink)
Good Old Mountain Dew
Sun Drop
Diet Mountain Dew

The following is a notable list of energy drinks, with a few coffee variants, and some soft drinks such as Coca-Cola, Mountain Dew, and Pepsi listed for comparison, and marked in a different color.
 The caffeine content in coffee and tea varies, depending on how the coffee beans were roasted, among other factors.
Mountain Dew (sometimes stylized as Mtn Dew) is a carbonated soft drink brand produced and owned by PepsiCo.
 The original formula was invented in 1940 by Tennessee beverage bottlers Barney and Ally Hartman.
 A revised formula was created by Bill Bridgforth in 1958.
 The rights to this formula were obtained by the Tip Corporation of Marion, Virginia.
 William H. "Bill" Jones of the Tip corporation further refined the formula, launching that version of Mountain Dew in 1961.
 In August 1964, the Mountain Dew brand and production rights were acquired from Tip by the Pepsi-Cola company, at which point distribution expanded more widely across the United States and Canada.
JO is a still soft drink made from fruit juices.
 It is manufactured by Britvic and sold in the United Kingdom and Ireland.
 Its launch in 1998 was aimed at providing an alternative solution for people who were going out to bars and clubs but were not drinking alcoholic beverages.
 The name ‘JO’ is a pun on the chemical formula for water, HO, chosen due to the drink's 50% fruit juice content.
 The first flavours available were Orange & Passion fruit, Apple & Mango and Apple & Melon, but the range has progressively grown since.
"Diet Mountain Dew" (sometimes stylized as Diet Mtn Dew) is a song by American singer and songwriter Lana Del Rey, taken from her second studio album "Born to Die" (2012).
 It was released as the album's first promotional single on June 13, 2011 by Universal Music Group.
Diet Pepsi and Diet Pepsi Classic Formula Blend (stylized as diet PEPSI CLASSIC SWEETENER BLEND) are no-calorie carbonated cola soft drinks produced by PepsiCo, introduced in 1964 as a variant of Pepsi-Cola with no sugar.
 First test marketed in 1963 under the name Patio Diet Cola, it was re-branded as "Diet Pepsi" the following year, becoming the first diet cola to be distributed on a national scale in the United States.
 In the 1960s and 1970s its competition consisted of Tab, produced by The Coca-Cola Company, and Diet Rite soda, produced by Royal Crown.
 Diet Coke was a later entrant to the diet cola market; though shortly after entering production in 1982 it became the primary competing diet cola to Diet Pepsi.
The Pepsi-Cola Made with Real Sugar, formerly called Throwback, is a brand of soft drink sold by PepsiCo in the United States and in sweet stores in South Australia for its flagship Pepsi and Mountain Dew brands.
 The drinks, called Pepsi Throwback and Mountain Dew Throwback, are named as such because they are flavored with cane sugar and beet sugar instead of high fructose corn syrup, which soft drink companies used to replace sugar (in their North American products) in the 1980s.
 In addition, these drinks use retro packaging.
 As of June 2014, Pepsi Throwback has been replaced in some areas of the United States by "Pepsi-Cola Made with Real Sugar", a new product formulation, also made without high fructose corn syrup.
BEAT is a citrus-flavored soft drink by The Coca-Cola Company released in Mexico in 2002.
 It was a Mexican version of citrus soft drinks like Mello Yello or Surge and a response to the release in Mexico of Mountain Dew by PepsiCo.
 Beat was discontinued in 2005.
 In 2009, it was re-launched in South Africa.
"Good Old Mountain Dew" (ROUD 18669), sometimes called simply "Mountain Dew" or "Real Old Mountain Dew", is an Appalachian folk song composed by Bascom Lamar Lunsford and Scotty Wiseman.
 There are two versions of the lyrics, a 1928 version written by Lunsford and a 1935 adaptation by Wiseman.
 Both versions of the song are about moonshine.
 The 1935 version has been widely covered and has entered into the folk tradition becoming a standard.
Sun Drop, also marketed as Sundrop, is a citrus-flavored soda produced by Dr Pepper Snapple Group.
 It has a yellowish-green color imparted by Yellow 5.
 Among soft drinks, it is known for its high caffeine content (63 mg per 12 oz can, 9 mg higher than a 12 oz can of Mountain Dew, but not as much as Vault with 70.5 mg per 12 oz can).
 Orange juice is an ingredient in the drink, and remaining pulp matter from the orange juice provides some of the soft drink's taste and appearance.
Diet Mountain Dew is a no-calorie Mountain Dew that was first introduced in 1986.
 It was formerly known as "Sugar-Free Mountain Dew" until 1986, when it was given its current name.
 In 2006 Diet Mountain Dew was reformulated with a new "Tuned Up Taste", using a blend of sucralose, aspartame, and acesulfame potassium as sweeteners.
 The previous formulation was sweetened exclusively with aspartame.
 In limited areas in the United States, Diet Mountain Dew has treated water instead of carbonated water as a fountain drink.