prefix vs suffix in mask attacks

[xabbix]

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?

[Snoopy]

https://hashcat.net/faq/morework

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