I see my car currently has 195,50,15 fitted both front and back.. But the standard size is the more expensive 195,55,15?

I have toyo proxie 4s on the front and goodyear eagle f1s on the back (bought it like this!)

Looking at camskill:
http://www.camskill.co.uk/m53b0s99p1667/TOYO_TYRES_CAR_TOYO_T1R_PROXES_TOYO_T1_R_-_195_50R15_82V_TL_

only £36 for 195,50 toyo proxies... £56.70 for them in 195, 55..


http://www.camskill.co.uk/m53b0s99p69262/MICHELIN_TYRES_CAR_MICHELIN_EXALTO2_PILOT_EXALTO_2_-_195_50R15_82H_TL_

£60 for PE2s in 195,50.... or £90 for them in 195,55..

also looked at advans.. then I thought i want them all round etc then I thought - But my front suspension is sitting to high/it would be a waste?

What sort of difference in performance will the two offer? and in each size? smaller PE2 or larger toyo?

anything wrong with fitting 55 to front and 50 to back?

£180+ or £62+ or somewhere inbetween..?!?!

tbh the back doesn't mind swinging out possibly a bit too much sometimes - I know I provoke it but I'm wondering if to ditch the eagle f1s..

this probably sounds like a rant - any advice welcome