Here you go...
https://www.bmj.com/content/374/bmj.n2074
Adults who have been fully vaccinated against SARS-CoV-2 can carry the same viral load of the delta variant as those who are unvaccinated, a preliminary analysis of UK data suggests.
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The latest results from the UK’s national covid-19 infection survey show that having two vaccine doses remains the most effective way to ensure protection against delta. But, although people who are fully vaccinated have a lower risk of becoming infected, those infected with the delta variant can carry similar virus levels as unvaccinated people, the data show. The authors said the implications for transmission were not yet clear but suggested that the potential for fully vaccinated individuals to transmit the virus to others would make achieving herd immunity more of a challenge
So yes you are better off being vaccinated but in terms of stopping the spread it helps with Alpha not so much so with Delta.