prefix vs suffix in mask attacks
I'm mostly working with Bitcoin related hashes, so 12700/15200/11300 and I'm wondering why Hashcat is generating password candidates much slower when I use something like ?a?a?aPassword vs Password?a?a?a.

Is there anything I can change or do to run prefixes at the same speed as suffixes?

see base and mod loos

short answer, the mask at the end is computed on your gpu which will run fast, front is computed at your hostcpu