Should I run MN or stake on wallet? What different between them?
If you have the sufficient amount of SYNX to run a masternode, it is better to run it on a VPS rather than staking it. Yes, it requires some technical skills to run a masternode properly but the reward that you can get from it is well-worth the effort and the rewards are usually consistent. I've been running it for almost 2 months now and I've been getting great rewards especially when people destroy their MN to sell at a loss.

Try it for a week and see for yourself if you will be satisfied with it.