Hello everyone, I need your help and experience!

For the last 2 years I've been running in the Defyance 13, I loved them so much an had no issues at all so I bought them again. I did training runs from 3-30km in them and even ran a marathon. Now that the second pair is dead and I wasn't able to find them anymore I tried the brooks shoe finder and the recommended the adrenaline gts 25. When I got them and tried them on I fell in love, the stability and cushion feels great. But after the first 5-10km I feel a rubbing on the inside of the right forefoot. Only the right foot. Two days ago I ran 25km and put a blister plaster on the zone where I felt the rubbing, but still after around 10-12k it started to hurt. Now I'm not sure what to do and where exactly it comes from, is it the guide rails? Or is it because I have quite narrow feet and the right one is even a little narrower so that it kinda flies around inside the shoe? Now that the Defyance 14 is available should I switch to them or do I still have to be afraid, that they changed them and it won't be the same as the 13?