I rarely ever use palm (I like my lard and tallow better), but it looks like mango would be an excellent (albeit expensive) sub for it according to it's fatty acid profile.
I went a little bit overboard and have a lot of mango on hand (love the stuff), and I use it in a few of my soap formulas- from 8% in one, and all the way up to 30% in another (70% CO/30% mango butter). I also use it in my body butter and lip balms.
I have mango butter from 3 different vendors- Columbus Foods, Soapies Supplies, and Oregon Trails, and all 3 are quite hard (I keep them in the fridge), but of different consistency 'as is' out of their packages.
To explain, my favorite is the one I get from Oregon Trails- I save that particular one for my body butter, lotions and lip balms only. It's so incredibly smooth, rich, and buttery 'as is', right out of its package.
The one from Soapies is very grainy right out of the bucket (I save it for my soaps), and Columbus Foods is somewhere in between, but much closer to Oregon Trails 'as is' than Soapies.
In product, all 3 are great, though. When melted and re-hardened they all have that dense, rich, decadent, buttery feel to them that I've only ever felt with mango butter. It has a wonderful, unique 'body' to it that I just don't feel with other butters. I guess what I'm trying to say is that it feels more 'creamy' to me than 'greasy'. It's wonderful stuff.
IrishLass