you do pay for the name be honest... 
but then again  like the ferrari landrover and escort. yes the ferrari is loads but it will handle better, maybe accelerate faster ete etc... 
whereas with a good spring and a good pcp like s410, the s410 will be quiter, easier to load, you get the 10 shot mag which is good...  its little things like that which i believe make up a good gun,,... the bsa ultra is a good little gun not very expensive its multi shot but it has its downfalls you will only get about 30 full power shots. whereas a s410 you will get about 80ish.... im only using the s410 as a exam