Had the same problem a few years ago, difference in blade gap was noticeable even to my wife. Here is the reply;
Dear Russell,
Thank you very much for your email. Sorry for not replying earlier, but I just returned from a business trip.
If the gap appears slightly uneven, it is due to normal tolerances and not an indication for a defect. The slight tolerances are quite normal (the chrome plating will not have the exact same thickness all over the razor), so this might lead to slight differences in the blade gap on one side of the razor head versus the other. Also, the razor is assembled by hand, so there will always be tolerances that do not influence the function of the razor, not its performance.
In addition the blade - when inserted - has a little bit of give around the cut-outs along the center for easier loading and removing. Since it is virtually impossible to hold the razor top 100 % in balance so you can center the blade perfectly, the blade will always be a little bit more exposed on one side than the other. Again, this is normal and will happen to basically every safety razor.
If you feel that one side is more agressive than the other, try loading the razor with the blade tipping it towards the less agressive side while closing it, so the more agressive side should become less so.
I hope I could shed some light on the situation. If you need further information, please let me know.
Best regards,
Anne
MERKUR Stahlwaren GmbH & Co. KG
Boecklinstr. 10
42719 SOLINGEN
GERMANY
phone: ++49-212-2300135
fax: ++49-212-313612
Mmmm! I didn't think so then and don't think so now. Maybe just a different lady, different tact