Question: Which mountain is highest, Saltoro Kangri or Gasherbrum IV?

Context paragraphs:
Gasherbrum I: Gasherbrum I (Urdu: ‎ ; ), surveyed as K5 and also known as Hidden Peak, is the 11th highest mountain in the world at 8080 m above sea level.  It is located on the Pakistani–Chinese border in Gilgit–Baltistan region of Pakistan and Xinjiang region of China.  Gasherbrum I is part of the Gasherbrum massif, located in the Karakoram region of the Himalaya.  Gasherbrum is often claimed to mean "Shining Wall", presumably a reference to the highly visible face of the neighboring peak Gasherbrum IV; but in fact it comes from "rgasha" (beautiful) + "brum" (mountain) in Balti, hence it actually means "beautiful mountain."

Gasherbrum IV: Gasherbrum IV (Urdu: گاشر برم -4‎ ; ), surveyed as K3, is the 17th highest mountain on Earth and the 6th highest in Pakistan.  It is one of the peaks in the Gasherbrum massif.

Walter Bonatti: Walter Bonatti (] ; 22 June 1930 in Bergamo – 13 September 2011 in Rome) was an Italian mountain climber, explorer and journalist.  He was noted for his many climbing achievements, including a solo climb of a new route on the south-west pillar of the Aiguille du Dru in August 1955, the first ascent of Gasherbrum IV in 1958 and in 1965 the first solo climb in winter of the North face of the Matterhorn on the mountain's centenary year of its first ascent.  Immediately after his extraordinary solo climb on the Matterhorn Bonatti announced his retirement from professional climbing at the age of 35 and after 17 years of climbing activity.  He authored many mountaineering books and spent the remainder of his career travelling off the beaten track as a reporter for the Italian magazine "Epoca".

Machulo La: Machulo La is a mountain view point which is considered the most easiest way to view some of the most highest peaks of Himalayas and Karakoram mountains in a single glance such as K2, Broad Peak, Gasherbrum-I, Gasherbrum-II, Gasherbrum III, Gasherbrum IV, K7, K6 and Nanga Parbat.

Gasherbrum: Gasherbrum (Urdu: گاشر برم‎ ) is a remote group of peaks located at the northeastern end of the Baltoro Glacier in the Karakoram range of the Himalaya on the border of the Chinese-administered Shaksgam Valley and the Gilgit-Baltistan territory of Pakistan.  The massif contains three of the world's 8,000 metre peaks (if Broad Peak is included).  Although the word "Gasherbrum" is often claimed to mean "Shining Wall", presumably a reference to the highly visible face of Gasherbrum IV, it comes from "rgasha" (beautiful) + "brum" (mountain) in Balti, hence it actually means "beautiful mountain".

Narendra Kumar (mountaineer): Colonel Narendra "Bull" Kumar (also spelled "Narinder"; born 8 December 1933) is an Indian soldier-mountaineer.  He is known for the mountaineering reconnaissance expedition he undertook in Teram Kangri, Siachen Glacier and Saltoro Range for Indian Army in 1978 at the age of 45.  If he had not undertaken this expedition, all of Siachen Glacier would be Pakistan's.  That is an area covering almost 10000 km2 , but because of his expedition, India conquered all the entire area.  Kumar crossed seven mountain ranges—Pir Panjal Range, Himalayas, Zanskar, Ladakh, Saltoro, Karakoram and Agil—to give India Siachen.

Sherpi Kangri: Sherpi Kangri is a mountain peak in the Karakoram Range.  It lies five km south of Ghent Kangri (7,380 m) and ten km northwest of Saltoro Kangri (7,742 m).

Burji La: Burji La (or Burji Pass) is a natural pass in mountains between Skardu and Deosai National Park in Gilgit Baltistan, Pakistan.  Its elevation is 4816 meters.  It is famous especially for its beautiful panoramic view of so many mountain peaks, including that of K2, Nanga Parbat, Masherbrum, Chogolisa, Laila Peak, Golden Peak, Gasherbrum I, Gasherbrum II, Gasherbrum IV and a part of Broad Peak mountain.

Wojciech Kurtyka: Wojciech Kurtyka (also "Voytek" Kurtyka, born 25 July 1947, in Skrzynka near Kłodzko) is a Polish mountaineer and rock climber, one of the pioneers of the alpine style of climbing the biggest walls in the Greater Ranges.  He lived in Wrocław up to 1974 when he moved to Kraków.  He graduated as engineer in electronics (in 1973 at Wrocław University of Technology).  In 1985 he beat "Shining Wall" Gasherbrum IV, which the magazine "Climbing" declared beat the wall to get the greatest achievement of mountaineering in the twentieth century.  In 2016, he received the Piolet d'Or for lifetime achievement mountain.

Saltoro Kangri: Saltoro Kangri (Urdu: ‎ ) is the highest peak of the Saltoro Mountains, better known as the Saltoro Range, which is a part of the Karakoram.  It is the 31st highest mountain in the world, but it is in a very remote location deep in the Karakoram.  It is located on the Actual Ground Position Line between Indian controlled territory in the Siachen region and Pakistani-controlled territory west of the Saltoro Range.

Supporting paragraphs: Saltoro Kangri Gasherbrum IV
Answer: Gasherbrum IV