chuckie egg and the physics thereof

reading the wikipedia link while bored at work, i discovered this:

The versions fall broadly into two groups - those with realistic physics (e.g. the BBC Micro and Amstrad CPC versions) and those without (e.g. the ZX Spectrum version). Although there is a substantial difference in play between the two, levels remain largely the same and all the 8-bit versions have been accepted as classics.

er, you WOT? i don't remember there being any massive differences between the BBC and spectrum versions - and i played both a lot. indeed, i've played them recently on emulators too. nor, to be honest, do i remember the "physics" being particularly realistic or unrealistic. it was just kinda standard jumping about, wasn't it? you could bounce off the sides of the screen; falling off the bottom killed you; er, that's all.

or am i missing something?