Don't misunderstand me I'm not parting with my #4 Mk2, & I don't find the aesthetics of the #1 as pleasing either, but it really does handle better, I don't know why there is so little difference in many ways.
Obligatory & gratuitous #4 pic:
Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”