The biggest difference by far is how simple they are. They don’t always feature bonus rounds, but if they do, these are short and sweet. So, if it’s simplicity you’re after, then 3-reel slots might be the best option.
Some players will tend to choose classic 3-reel slots purely based on the traditional feel and sentimental value.
The key benefit to 5-reel slots is unarguably their bonus features, which provide big win potential. There is also a huge amount of variation when it comes to paylines, themes bonus features ad RTP (return to player).
A wide range of 5-reel slots games also feature progressive jackpots, which could be activated at any time. So, if it’s features, big win potential and a more immersive experience you’re after, then 5-reel slots are the way to go.