My vets uses eurican brand vaccs and the manufacturer states boosters should be given for everything yearly

I know on the nobivac brand the manufacturer states that only lepto should be boostered yearly and the rest every three years.
I have found a vets in my area who uses nobivac on the three yearly schedule and is happy for my dogs to be registered with them just for their vaccs and stay with my other vets for everything else (my vets are fab and I really dont want to leave them) even though this other vets seems really good

I am waiting to call my vets at three to discuss mine being boostered with the nobivac at their practise but cant see them going for it as they have a contract with eurican

The very cinical side of me thinks the eurican is only used as its a money spinner to fully vaccinate every year BUT I cant help thinking is this actually a better brand of vaccine

I know when I speak to my vet hes going to say eurican is the better brand and they dont use nobivac for some specific reason (maybe its cheaper

) and want to be prepared but I cant find anything online comparing the two.
Amber was boostered with nobivac so I have definitely decided to have her just lepto vacc this year and not booster her for three years but Jack and Brie have been boostered on this eurican and im a bit confused what to do

As the eurican manufacturers guidlines only covers them for a year if they went on nobivac they would have to be given the full booster again and then it would go on the three yearly cycle

Flynn only had his first two injections last year so is due the full booster anyways and I am going to have him boostered with nobivac I think

Would it be something like the eurican is used yearly because they are giving a much smaller dose then the three yearly booster so there is less chance of side effects

Or is eurican giving the same dose and the manufacturers are just taking the mick

Any advice please