Brainstorm's 16MHz 68000 upgrade for the 128K/512K/Plus was a stand alone upgrade. It didn't include a SCSI port. That's not to say that they didn't make a combined CPU/SCSI upgrade.

There were many just-SCSI upgrades for the 512KE ('E' means the 512K has Plus ROMs). So you may have two upgrades: SCSI and memory, or one combined upgrade. Or conceivably three upgrades, SCSI, memory, CPU.

Adding a memory upgrade and a SCSI port upgrade to the 512KE was very popular back in the day.