Although a single line on a 5-reel slot is generally higher variance than a single line on a 3-reel slot, increasing the number of lines can more than compensate for the increased variance per line, so the combined bet over all lines arrange a 5-reel slot may be bring down variance than 3-reel slots.
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Addendum that the standard deviation of the majority of the multi-line video slots is lower than 7 Sultans, which is one of the lowest clash 3-reel slots. Silver Fang Silver Dagger. It's better to play with add lines rather than very little. Summer Smileys Summer Smileys.
Auspicious Stars Lucky Stars. This slot is all about the wild monkeys - all five of them. King of Macedoni The Green Machine. Penguin Ability Penguin Power. Dragon Reels Dragon Reels.