What are the advantages of choosing a Non-Immigrant O Visa versus a Tourist Visa for visiting my wife in Thailand?

if you get the O visa you can later get the 1 year version and extend that every year for 1900 baht. bu you need to hold 400,000 baht in the thai bank

There’s no silly questions. Some people assume they may be silly because they have the knowledge and can’t think that others don’t.

As to your options the single entry tourist visa will give you 60 days. You can get an extension for a further 30 days at a local immigration office which will cover the days you are looking for but you may have an issue with your airline not allowing you to board without a confirmed ticket out of Thailand within those 60 days, regardless that you could potentially get an extension.

A non O will give you the 90 days you need and eliminate that risk but it costs more and has greater requirements to obtain.

The choice is yours to make.

#1.....The Non O Visa as Married to Thai gets you 90 days STAMP on arrival into Thailand.

#2.....The SETV single entry tourist visa gets you a 60 day STAMP on arrival plus One 30 day extension of stay at Thai Immigration office for 1900 Thai baht.

AND if NEEDED longer stay,

You can apply for the 60 day family visit extension of stay at Thai Immigration office for 1900 Thai baht.

#3.....You also can enter Thailand Visa EXEMPT... Gets you 30 days STAMP on arrival plus One 30 day extension of stay at Thai immigration office.

And can apply for the 60 day family visit extension of stay at Thai Immigration office.

That third option is the easiest of the 3 described. It would give you 30 + 30 + 60 = 120 days stay in Thailand.

The advantage to the non O is it will provide you the 90 days, save you a trip to immigration. Non O seems easier to me

The way you say is easiest for that amount of days