Hi Johngilson. It appears that the two coil head you have linked would interchange one for the other. The question of importance here
(for me) would be ....Which one are you currently using??
Those coils fit inside a clearomizer body, so hopefully you have one of those that you are using and are shopping for replacement parts for that rather than something to screw direct into your battery to vape with....
If you are using the one as listed from royal vapor, the one listed at Apollo would be less warmth and overall less vapor output. If you are using the one from Apollo the opposite would be the expected outcome.
If you are shopping for replacements, you should stick with the same Ω load as you are already accustomed to, unless you are intentionally making a change with a specific outcome in mind. If you need more warmth (wattage output) then lower Ω load is what you are looking for, If you are looking for a cooler vapor then you are looking for a higher Ω load.
The battery you have listed looks like a standard unregulated battery so your wattage equation should look something like this 3.7v*3.7v/Ω =wattage , i.e. 3.7*3.7/1.8=7.6watts or 3.7*3.7/2.5=5.4watts.......Most folks would prefer the 7.6watts but every person has their own likes and dislikes. Here's to finding what you are looking for. Happy Vaping.