I'm looking forward to the replies on this one. I've heard of both, but never seen either, so I'm looking forward to someone dropping a titbit or two about their best fights. As I said, I can't give a pick myself as I've not seen either. But I do find Palma' record more impressive.
Estrada for a little bit of time was a pretty good fighter and best some outstanding fighters. I'd pick Estrada.
Just watched them, and I pick Estrada. Obviously I haven't seen much yet, but on first impressions I think his style is absolutely more agreeable here than Palma's. Estrada, to me, looked like a weird mix of Tyson and Cuevas but without the executional aspects those two had. He was a come forward Mexican slugger with a big punch who overwhelmed his guy. He also had this weird tendancy to shift into his punches like Tyson did, and his bob and weave was quite reminiscent of Kid Dynamite. Palma looked real good, and IMO better. But his aggression would only work against him vs Estrada. Although I may need to watch more. I certainly rank Palma higher, I think I had him number seven or eight on my super bantam top 10.