Miller has gotten better but agreed they’re nothing like Lincoln. Been welding since early teens and have more welders than one person needs, all lincoln.
Assuming you’re after a MIG you want an SP-140T as Tom mentioned, done deal. Fit’s you’re bill 100% and won’t leave you cursing at the machine with shit controls and poor performance. Can do flux if you have a job you don’t feel like hauling a bottle around to(shit exhaust repair for example).