Does PTSB Cashback trump AVANT low rate?

Switching from BOI as our fixed term ends in October. Looking to fix for at least 4 years...

Current rate: 2.9%
Balance: €300k
Remaining: 25 years
LTV: 59%

AVANT 1.95%, 4 years
€1,390 per month
Total after 4 years (€1,390 x 48) = €60,672

versus

PTSB Green 2.35%, 5 years,
€1,323 per month
2% cashback: €6,000
2% cashback per month: €26
After 4 years: (€1,323 x 48) = €63,504
Less csshback €6,000,
 Less cashback €26 x 48,
=€56,234

On the face if it, it appears that I'd be better off going with PTSB.

What am I missing?

Are the APRC figures significant, and if so, could someone please explain why?

PTSB 2.35% has APRC 3.15%.
AVANT 1.95% has APRC 2.02%

When calculating monthly/actual repayments over a period, should we use the APRC figure instead?

I've seen it mentioned numerous times on this website about PTSB'S lousy treatment of existing customers. If my calculations are correct, we'd pay 4k less by opting for PTSB.

BusyAtMaths said:

Switching from BOI as our fixed term ends in October. Looking to fix for at least 4 years...

Click to expand...

@BusyAtMaths Please post your mortgage details in the switcher thread (in the format shown in the first post). I'll estimate the savings you would make from switching to different lenders.

You cannot make accurate estimates of the savings by looking at the monthly repayments.

This post explains why you should look at the interest charged and not the repayments.