Roffu is a great choice for a lower-end well performing vape. Personally I don't rate the Mighty, it's fine but not much better IMO.
In terms of something like the Tinymight being 6 times better than the Oont, it's really dependant on what you value. The Tinymight is repairable whereas I don't think the Oont is going to be as easy to repair. Also the choice of materials, some of us aren't the biggest fan of plastic vapes.
Now I know the Oont is supposed to be decent, but longevity is going to be the big difference. I'm not saying the Oont couldn't last 5 years but it's less likely than something like the Tinymight.
I'm not saying every vape that's £200+ is worth that but some definitely have reasons for being that price and you can decide. There are more shops now that allow
MC users to try out vapes so this could be an option if you don't know anyone else with one that you could try.
There are a number of top quality vapes at the lower end of the market but they're lesser known and/or are harder to use in some ways.
For example, the Vaponic is one of the best vapes you can get flavour and potency wise. It's cheap af but it's easily broken and takes some technique to get good results. Something like a Mighty requires zero technique, you bung the weed in and suck the mouthpiece. I can get way more out of my weed and harder hits in the Vaponic than the Mighty but that won't necessarily be the same for someone else using the Vaponic.
That's why I've been recommending the Roffu to a lot of people. It's straightforward to use and easy to clean. Battery-powered so you don't need to learn any torch technique and you can easily swap out batteries. Metal body that feels well made and sturdy.
It's £108 on RVS at the moment, and great value at that price.