Are they the same target email address though? If not, surely that's not a fair test if the gmail account has been around for 10+ years or so? (I have the same

Are they the same target email address though? If not, surely that's not a fair test if the gmail account has been around for 10+ years or so? (I have the same situation, an 18-year old gmail account and a 6 year old fastmail account, but the reason I don't get ANY spam at all in the fastmail account is I only use it for certain things and it's much newer, so I'd argue at least in my case, that's not a fair comparison).