Reactine vs benadryl, (diphenhydramine) which one is more effective?

1st generation vs2nd: Reactine is ceterizine,a 2nd generation antihistamine supposedly non sedating,(some patients get sedated),it is a powerful antihistaminic, its main advantages over 1st generation is that patients don't develop tolerance (i.e. No need to increase the dose to keep the same effect) and is taken once daily, unlike Benadryl (diphenhydramine) , 1st generation antihistamine, > once a day dosing, toleran