Four words,
The one you play less is harder !
Alright that wasn't four words but you know what I mean

, its simply because you played more draws + stops with low spin on cueball that you find it easier as oppose to applying top spin, thats the thing. naturally once you learn stop shot, then draw shot, you will use them more often because theyre fun, then they became easy for you, because you actually literally shot more shots in this form.
Now if you also watch the pro's or even any good players around, they often apply outside english to ease the shot for them when cutting a ball, for example, if they cut the ball slightly to the right (And I don't mean severe cut, its just normal cut) they apply left spin (Outside english) they think it makes the shot easier, but the truth of the matter is, the same concept, they use this more often which made them memorize and have a feel of the shot, as oppose to applying inside english, they think its more difficult when its just that they arent used to it because they haven't shoot so many shots applying Inside English while cutting a ball.
Anyway you can ask Pat Flemming about this, he will also tell you, and some of his friends will tell you, that in the 80s he himself was making an experiment, where he started to use Inside English more often so see why it is difficult, and after few months using ONLY (And i mean literally) Inside English, he then had the feel of it and felt that they are as easy, and then when asked to apply outside english (Which most players think it helps making balls) he started missing shots and the outside english felt harder. So Pat Flemming if he cuts ball to the right, he apply right english, and if he cut ball to the left he apply left english during the experiment.
Anyway to sum it up, It's not that one is harder, its just the one that you play more will feel more easier, so yea shoot more balls with top spin and you will see it's as easy.
But a tip from me would be, don't over-go on the TOP edge of cueball when applying follow, try to go above center, then use either one tip above center, or half tip, you don't need to go to the far up edge of cueball to make force follow, this will also ease the aiming.