Digging cryptowalut is a long-term investment, the difficulty of digging up BitCoin is increasing for the current 4x a year, which also needs to be kept in mind.
Genesismining - a stable and solid cryptowalut mining company, already 3 years old, launched in February 2014.
Hashflare - Like GenesisMining, the company is involved in mining Cryptovalut already 3 years, the owner of the company is Sergei Potapenko.
In short, both companies are already long on the market and are reassuring for the time being. From my perspective, both sites are close to each other, although I have the impression that GenesisMining is for people with larger wallets, min contract is $ 30 and for HashFlare is only $ 1.2
You also have to add that on HashFlare we have the ability to choose the pool we want to dig, the whole interface is more transparent and accessible to the user.
The big overriding argument of GenesisMining over HashFlare is that GenesisMining is a much more familiar and trusted company than HashFlare.