It really depends on the place you're going to. Our local minilab will give nice almost true b/w prints on colour paper from Kodak TCN 400 and Ilford XP2. Why? Because they took the time to adjust a print channel to these films, so their machine can print them correctly.(posted 8657 days ago)Two other bigger processing labs (tourist quality) will print them sepia or brownish, because they are to lazy to adjust the machine properly. So they run a correction towards sepia, because people do not complain enough.
The alternative is a true b/w print on b/w paper with b/w chemistry.
On the other side I saw some good prints which looked like Sepia toned true b/w but were actually printed on color paper.
Regards,
Wolfram