i'd think that there would be difference in mechanical (and may be thermoelectric) stress that cells (or protein solution, etc.) is getting subjected to when applied by piezoelectric inkjet head. Piezoelectric inkjet head application though should be more precise probably.
With regard to extruder printers like MakerBot - putting the cell culture right into the extruder head and letting the filament serve as the pusher may just work without using syringe, etc..
With regard to extruder printers like MakerBot - putting the cell culture right into the extruder head and letting the filament serve as the pusher may just work without using syringe, etc..