Usually better than the real thing since what's in the can is ripe, juicy and tasteful.
Something we only get in the middle of summer from real tomatos in middle and northern Europe.
Note, though, that the can should contain tomatos with no salt (let alone acid) added. Just the pure product.
[1] These are circumstances where what I'm eating has nostalgic value from before my eyes were opened. Like how diced tomatoes on american style hard shell tacos gives me warm fuzzy feelings :)
Obviously not a guarantee, but you can at least eliminate ones that were canned too early or too late depending on variety. Common advice is to pick the ones canned between 215 and 245 (Early August to early September) as that's the typical harvest time.
I had to check and yes, the cans sold here (Switzerland) have the same code. Now I have a new hangup and that's buying those within the right range :)
215 = August 245 = September
Is it just the day of the year?
For reference: https://www.epochconverter.com/days/2023