As part of the development of this topic - I will gladly update the main post with the GPU performance charts in terms of speed achieved along with the best settings for both programs listed beside.
I remember that some time ago someone created something like that, taking into account the price of the GPU and the price-performance ratio, but I don't remember if it was in any of the previous topics on this challenge, such as VanitySearch, BitCrack or elsewhere, but if anyone remembers - I would be grateful for pointing to the link in order to be able to start developing the base version of this list. Creating it from scratch somehow I don't really want to go out :-)
VanitySearch benchmarks
https://bitcointalk.org/index.php?topic=5112311.msg50823897#msg50823897However, the speed using ttd version will be slower since it is searching for keys in one specific range versus original vanity search that searches using inversions and such.