Tough question because bedrock and mod are the same as far as kits (depends on server) but mods have a lot more duties to acomplish so it just depends
Mod takes more responsibility and trust. Bedrock just takes money. Well you can fly with both ranks. Bedrock gets more kits. With mod you get more respect towards you and you get stronger power. I would personally prefer mod and i think i would do a great job as mod but I can't apply cause I'm not over 14.
Mod doesn't give you bedrock rank. Some mods have bedrock kits because they either bought bedrock before they were mod or after.
Bedrock is better for playing the game and mod is better for helping the server. (Mod gets free emerald)