grime: video game basslines, slightly faster than 2-step (140bpm?), minimal zero-resonance beats, synth sounds as punctuation, rapid MCing
garage: in the UK, originally straight 4/4 (cf. speed garage) and based more on singing as well as MCs e.g. Somore's 'What You Want' and Smokin' Beats 'Dreams' - similar to US style luxurious soulful style
2-step: replaced the straight 4/4 of garage with a more 'breaky' beat ala sped up (130bpm-ish) hip-hop, resulted in a lot of pop hits e.g. MJ Cole's 'Sincere', Dem 2's 'Destiny' and Shanks & Bigfoot's 'Sweet Like Chocolate'
eski: Wiley's stark variant of grime, more bleeps and bloops, not a great deal of difference otherwise from what i can tell
― Frankenstein On Ice (blueski), Sunday, 2 January 2005 23:19 (twenty years ago)