My 5065E Deere has the Deere type loader, my Massey and New Holland have the Quick Attach system.
The Deere has a bucket and hay spears, but the bucket is so small that I never use it. I just keep the hay spears on it since that's the main use for the tractor.
For the Massey and New Holland, I have buckets, hay spear, pallet forks and a
grapple. So far, I haven't installed the parts needed to use the
grapple on the Massey. I'm not sure if I will, it's just a matter of spending the money, but the loader on the New Holland is so much stronger then the others, that I don't see the need. Same with the bucket, the New Holland has the biggest bucket, so that's what I use when moving dirt.
Having both systems may seem odd, but since the tractors are for different uses, it's not an issue with what to attach to them.
The best thing is being able to remove what's on the loader when mowing. Not having anything on there is so much nicer when going through the woods, down trails, and even out in the open areas.