Is a stock's price different across trading platforms?

Will E-Trade and TD-Ameritrade for example, show a different price on the minute by minute chart?

It is possible they show different charts, but this is not the same question as

Is a stock's price different across trading platforms?

because a different price may simply be an issue i.e. of time being off on a server. There is a lot of technology that can go wrong.

Price between platforms that follow the same rule SHOULD be identical, but it may differ base on technological issues between platforms (i.e. a data feed is out because a router failed, i.e.).

A one minute chart is a effectively a derivative of price because the provider is collating 60 seconds of data and creating a data point. It's very reasonable to expect that one platform may do this faster than another. It's also possible that other technology issues can add a tiny delay to the process (server speed, clock issues, starting/ending point of the minute, etc.).

One would expect that the current trade price/volume info for two platforms should be identical but I can attest to the fact that it's not. Occasionally, I have seen one of my brokers lag another by a second or two. And if I'm seeing it on the few stocks that I'm intently watching at a given moment, it must be happening an awful lot since there are many, many thousands of stocks trading.

I thought that maybe it was due to different platforms relying on a small set of different data providers. For example, yesterday the question came up and I checked the first 1-min bar on AMZN and found that TOS/TDA and Barchart were nearly identical, while there was a significant difference between them and TradingView, and Yahoo was way out there with 3176.25 for OHL&C.

      TDA   TradingView  Barchart    Yahoo

 O  3176.00   3175.22    3176.01   3176.25

 H  3178.97   3175.22    3178.97   3176.25

 L  3172.00   3173.76    3172.00   3176.25

 C  3176.25   3173.77    3176.25   3176.25