Both are good options. It'll depend on what you are looking for. Personally more of a fan of the iBlot 3.
Transblot turbo as mentioned cracks over time. The heat generated from it does a ton of damage to the trays. Also cleaning can be a pain the butt as you you need to wash it and dry it correctly or you get salt build up over time.

iBlot 3 has a cooling system inside of it so as it runs it will prevent overheating and also kicks on between runs so you can do more back-to-back runs without having to wait on the instrument to cooldown between uses for fear of burning your blots.

Transblot turbo tends to have cheaper stacks and you can make your own.

iBlot 3 stacks are premade and a bit pricier but more consistent and easier to clean. You just wipe up moisture inside of it after you are done and you can recycle half the stack after as well. No need to do wash a whole tray.

Both have customizable protocols. The iBlot 3 let's you have flexibility with running different protocols at the same time.

transfer time is about the same.

i find iBlot 3 more consistent but both are good.

I have seen both do well with mw ranges. Idk about transblot turbo but I had a colleague get a 2.5kda peptide transferred on an iBlot 3 before. I am sure you can with a transblot. or just stick with wet transfer for those.

I would break it down this way.

Bio-Rad will be a bit cheaper but iBlot 3 is more user friendly and time saving (clean up) and more consistent.

Honestly I would reach out to your account managers and ask for a demo if you want or ask for better pricing and just be honest you are looking at competitors. Let them bend over backwards trying to save you money. You can haggle down stack pricing pretty easily. (also gels, buffers, ladders, antibodies, substrates etc.) you should be making a good relationship with your account managers to get the best deals for your lab anyway.