The difference is simply the amount or concentration of oils in the fragrance. There is also pure perfume, which has the highest concentration, and eau de cologne, which has the lowest concentration of oils.
There is absolutely no difference in the fragrance. The difference is in the method of application only. However, a spray bottle, being sealed all the time, may actually have a longer shelf life. Making the decision between spray and splash is entirely a matter of personal preference.
Testers are even more discounted than the fancy boxed versions and are great if you don't have a need for the fancy box. Testers are 100% authentic, fresh and completely full just like the original fragrance, however they are meant for the counter in a department store. Testers often come in a plain white box but sometimes they do not have a cap or a box. The savings on the packaging means you save even more!
After Shave Lotion will usually sting as well as help close the pores after shaving. After Shave Balm is actually soothing to the skin. After Shave Gel also soothes the skin, but cools the skin as well and relieves razor burn.
Top notes are very light and last just a few minutes (5-10 minutes). Middle notes become apparent in about 15 minutes after application. These can last up to an hour or more. Bottom notes are the heavier ingredients. These last the longest, usually for several hours.
Keep all fragrances in a cool, dry area, and away from windows as sunlight can unbalance the various ingredients. An opened bottle should be kept in its box to insure a longer shelf life.
Hold one finger against the spray nozzle.
Use your other finger to pump the spray 10-15x.
Remove your finger from the spray nozzle.
Pump the spray another 10-15x as needed.
Allow the fragrance bottle to settle for 5-10 minutes.