Need supporting tools for PAC25140EVK1-B

  1. any documentation for PAC25140EVK1 advising what PAC25140EVK1-B “B” means? I see mouser digikey and RFMW show the “B” suffix.
    2)ET-UARTSWDadapter shows obsolete/discontinued is the UARTISO-1 what i should order and do you recommend a debugger as i read no debugger with UARTISO-1?

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