Ways of expressing a large difference:

much/far/a lot/considerably +

[adjective/adverb + –er] or [more + adjective/adverb]

Playing team sports is much riskier than many people imagine.

not nearly as + adjective/adverb + as

Some apps are not nearly as fun to play as computer games.

Ways of expressing a small difference:

slightly/a bit/a little + [adjective/adverb + –er] or [more + adjective/adverb]

People drive slightly slower than they did in the past.

Not quite as + adjective/adverb + as.

I don’t find running quite as enjoyable as cycling.

FCE : GRAMMAR 2018/19