The Squier version is the classic vibe range, which is the top of the Squier range so are excellent.
The Thomann basses are amazing value, very well made, sound really good, the electrics let it down, but easily changed. Do a search for reviews on Google, they are rightly well liked, especially for the price. The best bass you can buy under £100 IMHO.
The Squiers have more of a standard neck, whereas the Thomann one's have a traditional thicker neck.
I'd say buy the Thomann, see if you like it, if you do you can generally sell them for close to what they cost new, and upgrade to the Squier or Fender!