Karrimor used to be one of the worlds best outdoor kit manufacturers but made some bad investment decisions, went bust in the early noughties and were bought up and became one of the “zombie” brands in Mike Ashley's Sports Direct portfolio (nb Karrimor SF is a different company making decent kit).
https://en.m.wikipedia.org/wiki/Karrimor
I’d been abroad for a few years and it took me a while to realise what had happened and picked up a few pairs of lightweight Karrimor trekking shoes and lightweight walking boots from Sports Direct at very cheap prices £15-20. Since wising up to Karrimor’s quality (and Mr A’s “interesting” reputation as an employer, business associate and football team owner), I have made a point of avoiding Sports Direct, Field & Trek outlets and Karrimor products regardless of how cheap they are. Since I cannot recall the last time I went into a House of Fraser Store, boycotting them will not be a problem.
I used to do a fair bit of urban walking (30 plus miles a week) and the Karrimor shoes/boots served a useful purpose in letting me keep my decent hiking boots for the hills. IME the quality is not great and I was lucky to get much more than six months use before the soles started to disintegrate, the stitching came undone or the “suede” split. I am hard on boots and at <£20 they probably represent VFM but unless things have changed, Karrimor footwear is only really suitable for light use. Danner boots will be a different class in terms of quality and price from current Karrimor offerings.
No personal experience of Danner boots but rather than focussing on brand, IMHO, you would be better off starting by working out what sort of hiking you are planning to do and what time of the year you will be doing it - there is a world of difference between lightweight 2 or 3 season boots and fully stiffened 4 season crampon compatible boots.
Having identified to type of boots suitable for the conditions you will be hiking in, get out and try as many of that grade as you can - the fit and feel of boots made by different manufacturers can vary dramatically and the best quality boot with fantastic after sales service is useless if they give you blisters etc.
Then you have other choices - leather/synthetic, unlined/goretex etc. lined etc.
Scarpa boots work for me (I have Delta, SL and Manta boots for different conditions), but Meindl, Zamberlan and plenty of other brands have their fans and I’d recommend that you get out there and try as many as you can until you find what works for you. IME Snow & Rock staff are pretty patient and know their stuff.
Good luck and let us know how you get on.