

Maybe there’s not a huge difference, but the power usage of suspending is definitely lower, since only the RAM is getting power. CPU and disks have some idle power consumption, and you can have some background processes that wouldn’t be executed while suspended.
I use suspend-then-hibernate on my laptop (arch). It has a Nvidia graphics card, so it gives problems sometimes, but it mostly works fine.
I set it up like that in case I disconnect the laptop, so it will hibernate before running out of battery; it will also hibernate after 16h of being suspended (to save power), but I usually turn it back on before that.
I like suspending because my laptop has an HDD, and it is way faster to turn it back on this way.