assembler syntax: low(sym) vs. sym@l

[Greg McGary]

PPC provides this syntax for specifying 16-bit pieces of a word:
sym@h, sym@ha, sym@l.  m32r, OTOH, uses this syntax: high(sym),
shigh(sym), low(sym).

I need to choose a syntax for a new gas port.  Is there a substantial
reason (i.e., other than aesthetics) for choosing one over the other?
I'll likely go with @xx suffixes if there's no good reason to prefer
the other notation.

Greg