test cyp or sust?

to go with deca as a bulking cycle
for those of you with a good memory i aint started my first injectable cycle yet, due to illness really

the reason for being unsure of which will prove best is because i can get the sust of someone im better mates with BUT is unreliable in when he will get it. the test cyp i can get from a mate i know from way back with and now but not too sure on the source.
hence me asking which is better for bulking
cheers

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