Beginners/entry level bike

Hi I am looking for purchase a entry level road bike. I can get the Triban RC120 for £379 or the Carrera Vanquish 2020 with mechanical disc brakes which I can get through my work scheme so I would pay £270~ over the scheme (provided I don't leave the company). Is the RC120 worth the extra £100~.
I will use the bike to commute to work when the weather is not too bad (about 12 mile round trip) and also at weekends for leisure. I am finding it hard to choose, the reviews for the older Vanquish were not too great, but this is the new model (no reviews yet) but has mechanical disc reviews. Also I can get the RC120 now I may have to wait a few weeks for the Vanquish. What do you guys think, get the RC120 or potentially save £100~ and opt for the Vanquish?
Thank in advance
I will use the bike to commute to work when the weather is not too bad (about 12 mile round trip) and also at weekends for leisure. I am finding it hard to choose, the reviews for the older Vanquish were not too great, but this is the new model (no reviews yet) but has mechanical disc reviews. Also I can get the RC120 now I may have to wait a few weeks for the Vanquish. What do you guys think, get the RC120 or potentially save £100~ and opt for the Vanquish?
Thank in advance
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If it's flat mount, I'd almost be tempted to fit a new Shimano 7020 set on my Cube and put the 505s on the Vanquish (plus necessary drivetrain bits) to make it a hydraulic commuter.
Worth checking the max rider/luggage weights, Decathlon bikes have a history of low limits compared to Carrera.
2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo
Mechanical discs may not be as good as hydros, but they're likely better than rim brakes when it's wet.
Also, you can switch to some TRP Spyres in future if you want, and they are dual piston and like to be an improvement over the standard discs.
The RC120 Disc is £429 and there reviews of users having problems changing tyres on the RC120 disc with it's "Triban Tubeless ready wheel" and also is not in stock for several weeks.
My main dilemma is whether -
Triban RC120 is £100 better than the Carrera Vanquish.
Checked online, the saving on the Vanquish is £128 through the cycletowork scheme through halfords. so effectively £272 as long as I stay with the company for the duration, but I have to pay £20~ at the end of scheme to buy the bike off the company.
I did try to look up other bikes through Halfords and Tredz but they do not have stock and will not get stock of certain models till Sept/October.
I can get the RC120 now or the Vanquish next week or the bike after hopefully.
Boardman mechanical discs and 11/28 gearing
Triban RC120 microshift gear change. Better gear range more beginner friendly.
Vanquish same issues as Boardman
Personally I'd be looking at a bike with rim brakes 11/32 rear cassette and ideally 2x10 tiagra. Planet x or merlin giant contend, cube attain something along those lines.