Hello RobertdeHoop and welcome to the group. Unless you can get exit seats, I think those seats are worth going for. Like Mabuk dan gila I can't give the cast iron promise that the recline and pitch is exactly the same. But I have spent a lot of time wandering around the cabin and took a look at those seats as a potential backup if I'm in economy and can't get exits.

I'm almost certain that the recline/pitch is the same. You also have the following advantages:

1. Quieter - less engine noise. Also further away from the baby row
2. Fewer people choose the back rows. If the flight is not full, you're best placed to grab a centre row of 3 to yourself.
3. You are near the toilets, but in 69, 70 not so near that you're disturbed by smells. In fact I wouldn't worry even in 71 - EVA (or maybe its the jolly decent EVA pax?) seem to keep the toilets pretty clean.
4. Easy access to the galley area where the FAs often leave snacks out.
5. If you're in the aisles (69/71 C/H), you can lean over a bit without getting your shoulder/elbows knocked since the aisle is much wider here and you are in the "shadow" of 68C/H.

Have a good flight and don't forget to feedback your experience!