I'm trying to book a flight with Iberia for BER-MAD-BOG.
I'll need 15+23 kg baggage + I have a long leg, so I was thinking about buying the XL seats, so it'd be +422 EUR on that.
premium economy optimal comes out at +370 EUR, but then I didn't add any special seats.

My question is how are the seats on the premium economy compared to the cheapest economy? On the BED-MAD route I think there is actually no difference, is there? On the MAD-BOG route it's a different section, with supposedly better seats?

Which one would you recommend for this flight?