Power's about the same as Vivitar 283/285. GN110 w/ISO100 the link you give says 108.9 w/100.
Recycle with the Viv runs longer on MANUAL, ~8 sec. Auto can be pretty much instantaneous.
The viv also has a number of neat accessories.
Extension cable for the sensor, filter set(big whip), variable power widget(replaces the sensor) slave and shade for the sensor to block light from other flash units affecting the sensor/exposure.
I pick 'em up at thrift stores for ~$5.00 & clean the corrosion from the battery holders.