If you really want to uses crypto broker of course you need to compare it and there is so much to compare and analyze before you decide, personally its better to trade by yourself, you can get more experience and become better, the results of using broker might be disappointing, sometimes they are too aggressive in trading
A cryptocurrency broker can never do better than you will when you trade directly, they are there for business and they would protect their own interest first before protecting yours, so I too prefer to trade through exchanges myself, trading directly on exchanges gives better experience and would allow one to know more.
The worst I hate about a broker’s platform is their margin trade, they never have good intention for trader that is why they always do everything possible that the trade goes against the trader. I prefer to always stick to a reliable crypto exchange like Binance, bittrex, huobi and the rest to just personally trade their myself. If I fail, I know that it was not as a result of the exchange’s manipulation but as a result of my lack of knowledge, skills and strategy.