The real gunbot website is gunthy.org, I do not know who owns gunbot.com but thats not the owner himself, owner is Gunthar De Niro and his telegram is @GuntharDeNiro , so if you want to speak to the owner you can speak there. Gunbot.com is probably an affiliate who took that name in order to look more professional and can sell a lot more, but in reality gunthy is an .org and not a .com and that is why gunbot.com is not the real website.
You can check a million websites that sells gunbot there is gunbot.io there is buygunbot.com there is thecryptobot.com there is gunbot.vip there is a ton, and I know gunbot.com looks like a real deal, in reality it is totally not, the real deal is gunthy.org and you can ask the owner about it and he will confirm. It is an amazing bot and I would totally suggest everyone to use it.
Gunbot is sold thru Resellers, Guthy.org does not sell licenses, all those sites you mentioned are Official Gunbot Resellers and pretty soon you will see more, since every Gunbot Owner can become a reseller, a new site will be updated soon with a resellers page for buyers to verify and choose any particular reseller.
The price is the same for all, the choice of reseller is yours, some offer extra support or a different language.
You can read more about the new developments here:
https://viraltrading.org/gunthy-exchange-gunbot-school-resellers-program/Im also part of the new resellers program, so you can ask me if you have any more questions.
Hope it helps.