The advantage of going for dedicated summer tyres is that you have tyres that are optimized for the particular season, which you will use them in. They will perform well during the different weather conditions that you experience during the summer, like hot weather, summer rain, dry and sometimes wet roads. The rubber composition is designed to withstand the high heat, while still delivering the optimal grip, the same way as they are designed to reduce the risk for hydroplaning by pushing away the heavy summer rain that might hit the roads.
When you go to buy a set of summer tyres, make sure that you get the right tyres for you driving habits. If you use your SUV mainly in the city or on at least on good quality roads, then you don’t require any off road capabilities. If you do go a lot off road, there are specific tyres you should look into. Also if you have a high performance SUV and tend to go fast, then you need also high performance SUV summer tyres that will perform well at those speeds.
If you want to buy good tyres, you may want to look at the brands that invest heavily in R&D to continuously develop their tyres for the various weather conditions. If they invest in R&D, then you know that you will be getting quality and tested tyres. You may want to save money on buying budget tyres, but you will not and can’t expect to get the same superior performance that you will get from the branded ones.