Telogen effluvium is best described as an increased hair fall. That is more hair being lost in the shower, sink, on the shoulders and so on. After enough fall there may be thinning. Androgenic alopecia is gradual thinning with eventual change in the pattern of hair growth and thinning. Generally increased hair fall won't be noted with androgenic alopecia. You can have both with an underlying androgenic alopecia going unnoticed until a telogen effluvium comes along to make it more noticeable. In that case the hair lost to the telogen phase will grow back, but it might not get back to what you what you remember.