Li Shenron
Legend
The 5e system is easier to play, but I am still slightly more fond of the traditional 0e-3e traditional vancian.
For the purpose of comparing "systems" I think the two should have been merged into the same poll option. I don't think numbers and levels should make a difference in this poll, otherwise we should also differentiate 0e from BECMI and AD&D. Instead, the only system-wide significant difference between 3e and predecessors was the presence of some limited spontaneous casting for Clerics (and Druids in 3.5), and of course Sorcerer/Bard. But I still think this poll would be better if it was about different casting rules rather than edition's set of options.
The old-school version involved different default spell slots and a reduced presence of bonus spells (only clerics got them, if I recall correctly - I know for sure that wizards didn't get them), as well as "clerical spells" only having 7 levels while "wizard spells" had 9 levels. Plus there was a slight favoring of clerics by them having more base spell slots than wizards (likely to account for the need to prepare any healing spells, as spontaneous casting hadn't yet been implemented).
The two versions kind of match up in the mid-range of levels, but 3.5 had significantly more spell slots available to casters in the low-range, and often in the high-range of levels too because of access to higher ability scores and the bonus spell slots provided.
For the purpose of comparing "systems" I think the two should have been merged into the same poll option. I don't think numbers and levels should make a difference in this poll, otherwise we should also differentiate 0e from BECMI and AD&D. Instead, the only system-wide significant difference between 3e and predecessors was the presence of some limited spontaneous casting for Clerics (and Druids in 3.5), and of course Sorcerer/Bard. But I still think this poll would be better if it was about different casting rules rather than edition's set of options.