I have both the old vanilla Baldur's Gate series (unpatched and not GOG.com) and GOG.com version.
Recently, I played the GOG.com modded with BGT-WeiDu that combines two games into one plus tweaks, fixpacks, and unfinished bussiness (it's my first time using these mods).
Not sure if I'm doing it wrong, unlucky, or just didn't notice the change. But is BGT+mods actually harder than vanilla?
I still have the old vanilla version on my laptop. Somehow, I could finish the bandit camp on BG1 vanilla easier than BGT version. Both using Core AD&D difficulty. Same canonical party (imoen, minsc dynaheir, jaheira khalid). Both are around level 3-4. Though different main char (BGT : Archer, BG1 vanilla : Fighter/Thief).
Also, does BG2 nerfs applies on BGT version of BG1?