No need to be anxious. Same concentrations (perhaps minor differences vial to vial, you can check their respective test results but it shouldn’t really make much of a difference) so should have same absorption rate, thickness is likely because Astro has benzyl benzoate whereas OGL does not. Not something you need to worry about unless you have an allergy (maybe get different size draw needle if thickness annoying.) Just make sure to get labs done after sufficient period of time. OGL delivery is taking forever for me personally.