In terms of tonality and flexibility, they are very similar - unless OP is using a Pyro developer such as WD2D or PMK, in which case Delta 100 will lose a lot of speed compared with FP4+. While Delta is finer grained than FP4+, since OP is talking about contact prints from 8x10 negatives, grain, resolution and sharpness are non-issues. Delta has better reciprocity characteristics than FP4+ which may be of some value to OP in 8x10 if long exposures are anticipated.
As an aside to OP (Mark), if you use small or medium formats and you hate grain, do not rule Kodak out since TMX is the finest grained general purpose film around. It is noticeably finer grained than Delta 100 (Fuji's Acros falls in between), finer grained than Pan F+ etc.
As for the purist vs tabular issue, it will probably disappoint some people to learn that the films they consider "traditional grained" such as FP4+, Plus-X, HP5+ and Tri-X are not as traditional as they once were. The current versions of these films are more like hybrids of traditional and tabular technology. Perhaps "semi-tabular" would be a more accurate description.
Last edited by Michael R 1974; 11-13-2012 at 09:06 PM. Click to view previous post history.