There are a few different styles.
Blake ie hits a relatively flat ball that stays lower and is fast, to get this ball your opponet will have to keep a lower stance and hitting motion, not effective against someone that is accustomed to stop spinning but effect against 2hbh and if the opponet is out of position as this ball moves so fast and will fall too fast.
Nadal ie hits a ball that jumps right up and sits up, this is only effective if it reaches around shoulder height of opponet and is ver effective on the back hand side especially on 1 hbh and some times fore hand side and will tire the opponet out that is if you don't get tired first
(can't think of player) ie this ball is relatively slow but then when it hits the ground it jumps forward messing up timing of opponet as it speeds up, effective on all shots as long as it is used stratigicly and not constantly as the opponet will quickly adapt and kill.
Roger and ect ie this Player hits with high amount of spin for control but also flatens out the shot, so it is fast penetrating, but there is less errors than a Blakes style. Balls tend to carry more forward inertia and at times can become so heavy ie ball may speed up further or not slow down upon hitting the ground, this can also be acomplished with very very fast hard it flater shots but have a higher error rate. If you are out of position you can not return it, and at times if you are not perfect you will not make a choice return and it will end up being a defensive return that is scored on right away.
I can't say Nadal's or Roger's spin choice is better rather it will end up being the one that you have the most success with, I use a combo of both but am trying to flaten shots out more for when I am trying to score or force an error and more jump when I am working on the point or I am out of position.
My wife's brother was in a clay court country for 2 years and he plays Nadal's style, ball sits up high.
Most people would think you could just put it away and win no problem, but the ball has a vertical momentum that hits diferently than a ball that drops and bounces that high.
Only way to beat him is to get him out of position so he hits a defensive shot that you can either drop, hard angle, or some times flat shot.
If the ball bounces up like that with his choice shot even though it is not moving fast you can not kill the ball and it is hard to handle as the ball want to keep rising/has too much vertical inertia for that.
Any questions