Comparison
 Brother 418E-II (2) |  Brother 428E | |
| Manufacturer: | Brother Industries Ltd. (Japan) | Brother Industries Ltd. (Japan) |
| Mfg. date: | 1978 | 1979 |
| Size: | 7,6×14,3×2,1 cm | 7,6×14,3×2,1 cm |
| Weight (ready for operate): | 153 g | 158 g |
| Type: | four-function | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | algebraic | algebraic |
| CPU: | Mitsubishi M58618-81P | Mitsubishi M58618-81P |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) Ffloating-point notation | %calculation with percent +/-change sign (direct entry of negative numbers) Ffloating-point notation |
| Display: | 8+1 digit VFD (Futaba 9-ST-04) | 8+1 digit VFD (Futaba 9-ST-04) |
| Power: | 2×AA-type battery 3V adaptor | 2×AA-type battery 3V adaptor |