Help me choose my first gravel bike!

Hi there, I was hoping you guys could help...
I'm looking for my first gravel bike. I'm not able to spend more than £1000, and I'm weighing up these two bikes.
https://www.merlincycles.com/merlin-malt-g1-tiagra-gravel-bike-2020-147541.html
And
https://www.decathlon.co.uk/triban-rc520-gravel-id_8504030.html
Or... Could u just add gravel tyres to this??
https://www.decathlon.co.uk/triban-rc-520-disc-road-bike-navy-105-id_8554421.html
While all have a bargain basement price tag, they seem to have been well reviewed and appear to have decent components.
I was hoping that the knowledge on this group could help me make a decision.
Just so you know, I'm looking to do a tiny bit of road, but mostly forest tracks. (Road will pro xipalky be riding to the forest) Longest outings would be 4-5hrs. No real bike packing atm. Looking for a solid, tough bike that will serve me well, come rain or shine for a few years.
Many thanks
Ralph
I'm looking for my first gravel bike. I'm not able to spend more than £1000, and I'm weighing up these two bikes.
https://www.merlincycles.com/merlin-malt-g1-tiagra-gravel-bike-2020-147541.html
And
https://www.decathlon.co.uk/triban-rc520-gravel-id_8504030.html
Or... Could u just add gravel tyres to this??
https://www.decathlon.co.uk/triban-rc-520-disc-road-bike-navy-105-id_8554421.html
While all have a bargain basement price tag, they seem to have been well reviewed and appear to have decent components.
I was hoping that the knowledge on this group could help me make a decision.
Just so you know, I'm looking to do a tiny bit of road, but mostly forest tracks. (Road will pro xipalky be riding to the forest) Longest outings would be 4-5hrs. No real bike packing atm. Looking for a solid, tough bike that will serve me well, come rain or shine for a few years.
Many thanks
Ralph
0
Posts
https://www.paulscycles.co.uk/3615/products/giant-tcx-slr-2-carbon-cyclocross-2019-blackgreen.aspx
https://www.paulscycles.co.uk/3622/products/giant-toughroad-slr-gx-1-gravel-bike-2019-charcoal-grey.aspx
Both with hydraulic brakes all be it via giants conduct system which works just like standard hyd brakes.
https://www.chainreactioncycles.com/vitus-energie-cyclocross-bike-apex-2020/rp-prod182826
At one end, gravel bikes seem to be like road endurance bikes but with more tyre clearance. At the other end, they are pretty full-on with 650 wheels, massive clearance and close to a rigid mountain bike with drop bars.
Thanks
Throw in the Vitus gear specs and select gear inch stats, repeat again but use typical 2x gears of 34/50 chainrings and 11-34 cassette.
2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo