I’ve used both and prefer the argon mix,I think it’s 5% , it seems to weld cooler than co2 , I rent from boc on there hobby discount ( tell them your a member on here) it’s about a pound a week rent and around £50 for a refill
Argoshield light for the MIG, Pureshield for the TIG, both size Y bottles on the Volkszone deal with BOC.
They’re physically quite big bottles, but the deal is only available on that size and they work out a lot cheaper than the smaller options.
YMMV, and there are options with Hobbyweld and Adam’s Gas that have potentially lower on-costs but a much higher setup. Depends how much you’re going to need and where you are relative to your nearest stockists.
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