I noticed the Oases Energy on Amazon and figured it was a relabel. I did not see the Bluetooth connectivity which I like since you can monitor different aspects of the battery including the charge rate, cell equalization, turn battery on/off, etc. Plus it is a bunch more numbers to look at!
A couple of other thoughts came to mind. The battery description states that they aren't starting batteries. I was wondering if anyone has started 1) Their generator (I have an Onan QG 4000) and 2) Their RV using the emergency start button (I have a Ford E350 with V8 gasoline engine).
I didn't notice the ones you linked had the Bluetooth BMSs - that's the reason they are more expensive.
You will have no issue starting the generator - it's on a 100 amp breaker and each of those batteries is good for 100 amps continuous.
Even with FLA batteries, the Emergency Start will not start the chassis engine through the connecting solenoid only. It is a "boost/charge" feature. Depending on how dead the chassis battery is you may have to hold that Emergency Start switch a long time to put enough energy nack into the chassis battery to start the engine.
When my chassis battery died at a gas station, I ended up starting the generator (I had FLA house batteries at the time) and running it for about 15 minutes to get enough charge in the chassis battery to be able to start the engine with the help of the house batteries and converter.
So, you'll likely have the same experience with the two LFP batteries.