I know they are different. The question is why don't use just one, the one you think gives you the best advantage?
Of course you will notice differences. Otherwise, what's the point? I believe he already said why he doesn't want to use IB for data. He requires tick data and IB doesn't provide that. There's absolutely no reason why you can't mix and match execution platforms and data sources. I do it all the time across different brokers/firms and data feeds. Use what you think works best for you.
u can use either snapshot or real streaming. i use the real streaming. looking at that youtube u posted i just use td for there stock quotes and lvl 2 and not that time and sales thing in the video.
Because IQfeed and Esignal aren't brokers? Why is this concept so difficult for you. If the datafeed your broker provides doesn't meet your needs you can use one that does. If IB meets your needs then great. The fact that IB allows you to interchange Esignal's feed with their own feed ought to tell you that this isn't all that big of a deal. If broker feeds were so great Esignal, DTN, CQG and others wouldn't be in business.
if u use ever used interactive brokers and quotracker the volume is off compared with their own charts. their is also a cap at 100 and goes up only if you give them a certain amount of commisions. also know a few people who use different brokers and data feeds it's common. please more sh*t starters we need more people like you on here. go take some drugs or do something else better with your time. don't waste it here with your negativity.