Games : Why random encounters are harder when playing Baldur's Gate Tutu?

It's so benefical the fact that you can unite almost the entire saga in one game: (BG1 + TotSC) + (BG2:SoA + ToB) with the use of EasyTutu and G3 Widescreen mods.

Now, I don't remember the battles of the very beginning of the game being so.. challenging, in an unjustified way. Once I'm outside, almost everything is hard to beat, One wolf is able to kill Imoen in one bite, she has 8/8 hp.

However I remember that my brother back then used a mod that makes battles even more harder to handle, but all I installed is EasyTutu and the widescreen mod..

Does EasyTutu also make things harder? Is there a way to fix or restore the difficult of the encounters back to the original?