Ridiculous NPK levels you guys get, also that's not the only thing to look at anyway. I've only used general Purpose miracle gro, it seemed OK, but anyone looking at MG should go for the tomato specific type. A general purpose fert doesn't really feature much calcium, magnesium and other minor minerals that fruiting plants like tomatoes and chillies need. So if you can't get anything chilli specific, at least use something tomato specific if possible.
I usually use organic ferts as they have lower prices, but they will not work with most non compost based potting mixes in containers, not enough organisms in there to break down the organic matter, it's just going to get moldy.
So best bet is potting mixes that consist of a fair bit of compost and bark and then add in manure pellets and bone meal and blood meal, then go have a beer for a few months while not fussing about fortnightly feeds etc.
IE in Australia rooster booster chicken manure pellets, or Dynamic Lifter pellets, and a bit of blood and bone meal in debco or amgrow organics potting mix is all you need.
If you use a plain commercial potting mix though, manure pellets with blood/bone meal may just go nasty with mold and the plants will be bad as nothing has broken down to feed them.
So if using that non organic mix, I've never had a problem with the miracle gro I have seen here (15-13-12) or Focus liquid fert which is 13-3-10. It wasn't by choice, it was just through personal learning of what various regular potting mixes just didn't work well with organic ferts in containers the hard way, and focus or MG didn't have any problems really.
But you may as well use slow release granuals which have 0 risk of burn and often have lower prices, more minor minerals.
And also at the end of the day, going organic is better as you never have to worry about calcium anyway or go out and buy 'cal/mag', so why bother with cheaper potting mixes and more expensive chemical ferts? Better off buying more organically based potting mixes which drain better anyway usually, and cheap blood/bone meal and manure pellets and kelp/fish products.