Testoviron test enanthate by Shering costs twice as much as IP test enanthate. Is it twice as good??

Organon test enanthate costs 1/3 more than Shering. Is it 1/3 more effective??

What gives the most bang for the $ ?

How much IP test enanthate should I take to equal 500 mg of Testoviron by Shering??

Thanks.