The first Stud Mount is the better one… for either the roof or any bracket mounting.
Firestik - K4DD - Stainless Steel Disc Mount - Electronics Superstore www.WalcottCB.com
The second uses Firewire from Firestik and it is not the best connection for coax, can get dirt in the connection and I do not think the coax is good quality.
Where to mount the antenna is a individual choice, some use the Frt Fender Mounts, some have mounted Ball Type Mounts to the rear of the Cab, some use the Tail Gate Mount.
Buy one type of mount and try it.
The roof mount, even with the hole in the roof, should give the best over all performance but every truck is different and what works best on one is not the best on another.
Me, without a Headache Rack the Roof Mount would be seriously considered.
You might try a Frt Fender Mount and see how it works, it might do just what you want and you save the hole in the roof, do a temp install and see if it works for you and what you plan on doing with the CB; you lose nothing but a little time and coax.
Good grounding is a must.
Good Coax is a must either Belden or Time MicroWave, NOT RAT SHAQ !
Make sure your Antenna Mount is grounded the best.
Get the system tuned…
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter