Sure enough McKenzie did a good job disguising his depression at work. Vastly different trying to hide the symptoms at home thou. And tellingly enough McKenzie was in tears on the phone to his mum several times. Hence if McKenzie did the unthinkable his family would be able to confirm anxiety issues. Gary Speed's family are mystified because he didn't display any anxiety symptoms.
Secondly, the difference in the two characters and their circumstances are stark. LM was estranged from his wife and kids who were his life whereas GS had a seemingly idyllic homelife. LM was beset with lengthy career threatening injuries and he was worried he had no future. GS had a very successful playing career and a promising future in management. LM had to deal with the tragic suicide of his sister who was having race and identity issues which he may have shared. GS had no such history and was a proud and certain of his heritage. LM says he went around squandering money on gambling and nights out whereas GS was a settled family man and the captain of every club he played for. So again if LM did the unthinkable there is significant evidence to point to why.
Thirdly, it is my understanding that depression suicides usually happen after a lengthy downward spiral and ends up with the individual succumbing to that option as the final straw. And usually they do it away from the home. LM had a lengthy downward spiral and was away from home. Stan Collymore had a 5 week downward spiral and took a rope to some woods. GS was on Football Focus, at ManU, at a party and everybody says he was on top form. He suddenly snap decided to do it at home seemingly without the life issues and worries LM had and without displaying anxiety to his family at any point.
The article only serves to demonstrate the vast differences between a classic depression suicide attempt and GS's demise imo.