Yes, they are two very distinct events. As are there two very distinct resurrections: The resurrection unto Life by the Spirit of Christ and the resurrection unto Judgement, to the second death and the lake of fire. John 5:29.
Both of these resurrections are literal, physical resurrections of the physically dead:
Act 24:14 But this I confess to you, that according to the Way, which they call a sect, I worship the God of our fathers, believing everything laid down by the Law and written in the Prophets,
Act 24:15 having a hope in God, which these men themselves accept, that
there will be a resurrection of both the just and the unjust. (ESV)
Paul clearly states here "that there will be a resurrection of both the just and unjust"--it had not yet happened.
Rom 6:3 Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death?
Rom 6:4 We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life.
Rom 6:5 For if we have been united with him in a death like his,
we shall certainly be united with him in a resurrection like his. (ESV)
Again, Paul is clearly speaking of a literal, physical resurrection, the same as Jesus', which had not yet happened. And it isn't until the end of Revelation that we see the two resurrections occur. They happen after many things that have yet to take place.
The trumpet call is a call to judgement, so if you await the coming of the son of man, you might just find yourself saying Lord, Lord, and hearing nothing but depart from me, for I never knew you.
But that isn't what the Bible says:
1Co 15:51 Behold! I tell you a mystery. We shall not all sleep, but we shall all be changed,
1Co 15:52 in a moment, in the twinkling of an eye, at the last trumpet.
For the trumpet will sound, and the dead will be raised imperishable, and we shall be changed.
1Co 15:53
For this perishable body must put on the imperishable, and this mortal body must put on immortality.
1Co 15:54 When the perishable puts on the imperishable, and the mortal puts on immortality, then shall come to pass the saying that is written: "Death is swallowed up in victory." (ESV)
The last trumpet signals the resurrection of the dead, both righteous and unrighteous. And again:
1Th 4:13 But we do not want you to be uninformed, brothers, about those who are asleep, that you may not grieve as others do who have no hope.
1Th 4:14 For since we believe that Jesus died and rose again, even so, through Jesus, God will bring with him those who have fallen asleep.
1Th 4:15
For this we declare to you by a word from the Lord, that we who are alive, who are left until the coming of the Lord, will not precede those who have fallen asleep.
1Th 4:16
For the Lord himself will descend from heaven with a cry of command, with the voice of an archangel, and with the sound of the trumpet of God. And the dead in Christ will rise first.
1Th 4:17
Then we who are alive, who are left, will be caught up together with them in the clouds to meet the Lord in the air, and so we will always be with the Lord.
1Th 4:18 Therefore encourage one another with these words. (ESV)
We see the same thing said again, but not only that, we clearly see in verse 15 that Paul does not believe that believers have already been resurrected nor that Jesus has come already. Your positions on just what the resurrection and second coming of Jesus are, go very much against Scripture, as I have shown.