Sandro has stated (livestream last year) that under the new system each level will take an average of 2.8 rolls ( I had to laugh when it took them 5 last night

)
Old system material use, first ship:
Allowing for 3 grade 5 rolls it will take:
Grade 1: 3x1=3
Grade 2: 3x2=6
Grade 3: 3x3=9
Frade 4: 3x3=9
Grade 5: 3x3=9
A total of 36 mats per module.
Allowing for core internals and shields:
Bulkheads, drives, powerplant, fsd, distributer, life support, sensors, shields
Gives a material cost of for a base ship of 288 mats
Old system, second and subsequent ships:
Grade 5: 3x3=9
Allowing for core internals and shields:
Bulkheads, drives, powerplant, fsd, distributer, life support, sensors, shields
Gives a material cost of for a base ship of
72 mats
New system material use, first AND subsequent ships:
Grade 1: 1x2.8=2.8
Grade 2: 2x2.8=5.6
Grade 3: 3x2.8=8.4
Frade 4: 3x2.8=8.4
Grade 5: 3x2.8=8.4
A total of 33.6 mats per module.
Allowing for core internals and shields:
Bulkheads, drives, powerplant, fsd, distributer, life support, sensors, shields
Gives a material cost of for a base ship of 268.8 mats
(Each weapon would be 33.6+ ~10 mats for a special effect)
The first ship core modules will be faster to engineer to grade 5. Per module it's 36 (old) vs 33.6 mats (new).
For the core internals and shields it will be
Old system = 72 mats
New system = 268.8 mats
For the first module with a special effect at an engineer (eg weapons)
Old system = 54 mats (36 mats for module, +18 for special effect)
New system = ~43.6 (depends on special effect)
For subsequent upgrades with special effects available at the same engineer
Old system = 21 mats.
New system = ~43.6 (new, depends on special effect)
Without special effects modules take:
Old system = 36 mats then 9 for every subsequent module at the same engineer
New system = 33.6 for every module